AU: XmlEncode the previous version, just in case.

omaha_request_action.cc

 // Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "update_engine/omaha_request_action.h"
 
 #include <inttypes.h>
 
 #include <sstream>
 
@@ skipping 96 matching lines @@
     string prev_version;
     if (!prefs->GetString(kPrefsPreviousVersion, &prev_version)) {
       prev_version = "0.0.0.0";
     }
     if (!prev_version.empty()) {
       body += StringPrintf(
           "        <o:event eventtype=\"%d\" eventresult=\"%d\" "
           "previousversion=\"%s\"></o:event>\n",
           OmahaEvent::kTypeUpdateComplete,
           OmahaEvent::kResultSuccessReboot,
-          prev_version.c_str());
+          XmlEncode(prev_version).c_str());
       LOG_IF(WARNING, !prefs->SetString(kPrefsPreviousVersion, ""))
           << "Unable to reset the previous version.";
     }
   } else {
     // The error code is an optional attribute so append it only if the result
     // is not success.
     string error_code;
     if (event->result != OmahaEvent::kResultSuccess) {
       int code = event->error_code;
       if (!utils::IsNormalBootMode()) {
@@ skipping 325 matching lines @@
   output_object.needs_admin =
       XmlGetProperty(updatecheck_node, "needsadmin") == "true";
   output_object.prompt = XmlGetProperty(updatecheck_node, "Prompt") == "true";
   output_object.is_delta =
       XmlGetProperty(updatecheck_node, "IsDelta") == "true";
   output_object.deadline = XmlGetProperty(updatecheck_node, "deadline");
   SetOutputObject(output_object);
 }
 
 };  // namespace chromeos_update_engine